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27 lines
841 B
27 lines
841 B
# HG changeset patch
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# User Marco Bodrato <bodrato@mail.dm.unipi.it>
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# Date 1634836009 -7200
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# Node ID 561a9c25298e17bb01896801ff353546c6923dbd
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# Parent e1fd9db13b475209a864577237ea4b9105b3e96e
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mpz/inp_raw.c: Avoid bit size overflows
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[Retrieved from: https://gmplib.org/repo/gmp-6.2/rev/561a9c25298e]
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Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
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diff -r e1fd9db13b47 -r 561a9c25298e mpz/inp_raw.c
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--- a/mpz/inp_raw.c Tue Dec 22 23:49:51 2020 +0100
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+++ b/mpz/inp_raw.c Thu Oct 21 19:06:49 2021 +0200
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@@ -88,8 +88,11 @@
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abs_csize = ABS (csize);
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+ if (UNLIKELY (abs_csize > ~(mp_bitcnt_t) 0 / 8))
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+ return 0; /* Bit size overflows */
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+
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/* round up to a multiple of limbs */
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- abs_xsize = BITS_TO_LIMBS (abs_csize*8);
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+ abs_xsize = BITS_TO_LIMBS ((mp_bitcnt_t) abs_csize * 8);
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if (abs_xsize != 0)
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{
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